Senior Smart Contract Engineer - Protocol

Ztakora; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

Ztakora in Singapore seeks a senior Solidity engineer to own contract boundaries for model registries, compute receipts, storage proofs and access policy. You will align the on-chain surface with the AI runtime and permanent storage layer, and ensure verifiable, testable security boundaries.

You will design Solidity modules with OpenZeppelin patterns, model subnet membership and timelocked changes, write invariant tests, review external contributions and collaborate with AI runtime and storage

Qualifications

• Deep Solidity 0.8.x and EVM execution knowledge.
• Strong Foundry experience, including fuzz and invariant testing.
• Evidence of secure access-control, registry or token-system delivery.
• Clear technical writing and asynchronous review habits.

Responsibilities

• Own the contract boundary for model registries, compute receipts, storage proofs, access policy and governed protocol change.
• Turn the Ztakora Grid protocol direction into a compact contract suite whose permissions, invariants and compute-certification paths can withstand independent review.
• Implement model-registry, compute-receipt, storage-proof and access modules with invariant tests.
• Define deployment, verification and privileged-action runbooks with the security owner.
• Prepare an assurance package covering limitations, test evidence and remediation status.

Skills

Solidity 0.8.x

Foundry

OpenZeppelin

Slither

Tools

Foundry

OpenZeppelin

Slither

Job description

Own the contract boundary for model registries, compute receipts, storage proofs, access policy and governed protocol change.

Turn the Ztakora Grid protocol direction into a compact contract suite whose permissions, invariants and compute-certification paths can withstand independent review.

The Grid anchors model provenance, dataset references, compute receipts and access policy. This role keeps the on-chain surface narrow, testable and aligned with the AI runtime and the permanent storage layer.

Four reviewable outcomes for the contract boundary.

• 01 Produce a reviewed contract map covering roles, subnet boundaries and upgrade paths.
• 02 Implement model-registry, compute-receipt, storage-proof and access modules with invariant tests.
• 03 Define deployment, verification and privileged-action runbooks with the security owner.
• 04 Prepare an assurance package covering limitations, test evidence and remediation status.

You will own

• Design Solidity modules with established OpenZeppelin patterns.
• Model subnet membership, role separation, multisig authority and timelocked change.
• Write unit, integration, fuzz and invariant tests before release decisions.
• Review external contract contributions and document consequential tradeoffs.
• Partner with the AI runtime and storage owners on receipt and recovery state.

Strong fit

• Deep Solidity 0.8.x and EVM execution knowledge.
• Strong Foundry experience, including fuzz and invariant testing.
• Evidence of secure access-control, registry or token-system delivery.
• Comfort rejecting unnecessary on-chain complexity.
• Clear technical writing and asynchronous review habits.

SolidityFoundryOpenZeppelinSlitherSubnet architecture